Improvement in bolt-heading machines



0. B. ALLEN. Bolt-Heading. Machine.

No. 203,982. Pa te nted May 21, I878;

m' ez' N. PETERS, PMOTO-LITHOGRAFHER. WASHINGYDN. D O,

UNITED. PATENT om-ca.

"oHAR Es- B4. .A'L'LEN, 0F PHILADELrHIA, PENNSYLVANIA.

' IM'PROVEMENT'IN BOLT-HE ADlNG MACHINES.

Specification forming art of Letters Patent No. 203.982, dated May 21,187B application filed .September 21, 1877.

To all whom it may concern:

Be it known that I, CHARLES B. ALLEN, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulImprovement inMachines for Heading Bolts or Rivets; and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

The objects of my invention are to simplify the construction of themachine, to protect the working parts from injury, and to bring the workdirectly under the control of the operator.

. These objects I attain in the following manner, reference being had tothe accompanying drawing, in which Figure 1 is a side view of myimproved machine for heading bolts and nuts; Fig. 2, a plan view, partlyin section; and Figs. 3 and 4, detached views of parts of the machine,drawn to an enlarged scale.

A is the die-holder, which swings vertically on trunnions B B, adaptedto bearings. in the frame of the machine. One trunnion is provided withan operating-handle, b, and the other with a toothed wheel, 6, to whichis adapted a pawl or catch,d, hung to the frame of the machine.

G is a tube adapted to the holder A, so as to revolve therein for thepurpose of bringing all sides of the bolt-head in contact with thehammers.

D is a ratchet or detent wheel attached to the rear end of the tube 0,in order to so gage the movement of the die as to form the style of headrequired, this ratchet being provided with a suitable hand-wheel, bywhich it may be operated.

E is a tubular die secured in the outer end of the tube 0. In this diethe blank is placed previous to forming the head. F is a tubular bolt,which screws into the opening in the tube O at the end oppositethe dieE. Gr is a rod or bar extending through the bolt F, and having on theinside a head, which bears against the said bolt, thus preventing therod from being forced out by the pressure upon the blank during theheading operation.

H is an extension-screw, one end of which rests upon the rod G, whilethe other forms an abutment for the blank. The object of this screw isto gage the length of the bolts made.

This screw can be removed and the blank allowed .to rest directly uponthe rod G, if the length of the bolt is such as to require it.

I is a trip, held upon the body of the machine by a suitable bearing, inwhich it is allowed to slide vertically, this trip being operated bymeans of a foot-lever or treadle, a, so as to act upon the rod Gr whenthe die-holder A is in a vertical position, for the purpose of ejectingthe bolt or rivet from the die.

J is a cross-head, which slides in suitable ways, and is operated by acrank or eccentric, K, on the main shaft. This cross-head carries a die,L, which upsets the blank and forms the top of the head.

M M are plates, operated by eccentrics or cams N N and toggles O O, theplates and toggles being arranged horizontally in recesses in the bed ortable of the machine, and being covered by suitable plates, whichprotect them from injury when the machine is in operation, but which canbe readily removed in order to gain access to the plates or toggles.

The plates M M are provided with dies a,

held to the body of the plate by means of a tongue or dovetail, c, asshown in Figs. 2 and 4. These dies are made in two separate parts, asshown in Fig. 4, furnished with a male and female screw. When the die isin place the body of the plate M bears against the side of the die, andprevents it from turning. When it is removed, however, it can be set atany length required. In this way I make one set of dies answer for allthe different sizes of bolt-heads, whereas without this arrangement adifl'erent set would be required for each size.

The eccentrics N N are set in such a position on the shaft opposite thecrank K, which drives the cross-head J, as to allow the said crossheadto nearly finish its work of upsetting the blank before the hammers arebrought into action; and in order to bring the work to a closer calipermeasurement, I place upon the eccentric-rod right and left handadjusting-screws and nuts 9 g, which increase or diminish the stroke ofthe hammer to allow for the adjustment which may be found necessaryafter the dies a have been set.

The operation is as follows: The extensionsc'rew H is first set to suitthe length of bolt required, as shown in Fig. 3, and the heated blank ofthe proper length is then inserted. in

the die E while the holder A is in a vertical position. The said holderA is then tilted forward to a horizontal position by means of the handleI), and is held in this position by the latch d. The cross-head J,advancing, upsets the blank. The dies at a next come in contact with it,and-then recede, and two sides of the head are formed. The tube carryingthe die is then turned, by means of the detent-wheel D, to such anextent as to bring the next two sides in position to be operated upon bythe dies at. The same operation then takes place 'as before, and so onuntil all the sides have been sufficiently operated upon. The latch d isthen raised, and the holder A again brought to a vertical position. Thisbrings the end of the rod G in contact with the trip I, and theoperator, by placing his foot upon the treadle e, forces the bolt out ofthe die, and the operation is completed.

I wish it to be understood that I do not dehorizontally, with thedie-holder sire to claim, broadly, the combination of a rotating andtilting bolt-holder with headingdies operated by means of toggles, assuch a combination is shown in the patent of Taft, No. 14,258, February12,1856; but l I claim as my inventionp 1. The combination of theeccentrics N and the toggles 0, plates M, and dies a arranged A hung tothe frame of the machine, so as to be capable of being turned from ahorizontal to a vertical position, as set forth.

2. The combination of the tilting die-holder A andits central tube 0with the ratchet D and its hand-wheel, carried by and moving with thesaid holder A, as specified.

CHAS. B. ALLEN.

Witnesses: I I

' RUFUS H. SANFORD, WM. P. ALLEN.

